WO2023112766A1 - 電源システム及び電源システムの制御方法 - Google Patents

電源システム及び電源システムの制御方法 Download PDF

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Publication number
WO2023112766A1
WO2023112766A1 PCT/JP2022/044841 JP2022044841W WO2023112766A1 WO 2023112766 A1 WO2023112766 A1 WO 2023112766A1 JP 2022044841 W JP2022044841 W JP 2022044841W WO 2023112766 A1 WO2023112766 A1 WO 2023112766A1
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WO
WIPO (PCT)
Prior art keywords
power supply
axis direction
element group
drive system
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/044841
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English (en)
French (fr)
Japanese (ja)
Inventor
広徳 相田
誠治 高井
浩一 西山
良一 奥山
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GS Yuasa International Ltd
Original Assignee
GS Yuasa International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GS Yuasa International Ltd filed Critical GS Yuasa International Ltd
Priority to CN202280091521.5A priority Critical patent/CN118695966A/zh
Priority to US18/719,072 priority patent/US20250091479A1/en
Priority to DE112022006013.1T priority patent/DE112022006013T5/de
Priority to JP2023567715A priority patent/JPWO2023112766A1/ja
Publication of WO2023112766A1 publication Critical patent/WO2023112766A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
    • B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/20—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having different nominal voltages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
    • B60L58/21—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules having the same nominal voltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems

Definitions

  • the present invention relates to a power supply system mounted on a mobile body and a control method thereof.
  • a mobile object such as an automobile is equipped with a high-voltage battery (main power supply) that supplies power to the drive system and an auxiliary battery (sub power supply) that supplies power to the auxiliary system. Furthermore, in the mobile object, a backup power supply (alternator) that supplies backup power to the auxiliary system in the event of a failure of the auxiliary battery, and a DC/DC converter that supplies power from the drive system to the auxiliary system by performing voltage conversion.
  • a DC converter is provided (see Patent Document 1, for example).
  • An object of the present invention is to provide a power supply system that is lightweight and space-saving.
  • a power supply system is a power supply system provided in a mobile body, which includes a plurality of power storage elements and is connected to a drive system for moving the mobile body.
  • a first element group including a main power supply and including at least one power storage element that is part of the plurality of power storage elements is a backup power supply configured to be connected to an auxiliary equipment system of the moving body.
  • a first element group including at least one storage element of a main power supply having a plurality of storage elements and connected to a drive system is configured to be connected to an auxiliary system.
  • a control method for a power supply system provided in a mobile body, which is a backup power supply is such that, when an abnormality occurs in the power supply from the main power supply, power is supplied from the backup power supply to at least one of the auxiliary equipment system and the drive system. supply.
  • FIG. 1 is a perspective view showing the appearance of a power storage device according to an embodiment
  • FIG. 1 is an exploded perspective view showing each component by disassembling a power storage device according to an embodiment
  • FIG. 1 is a perspective view showing the configuration of an electrode body according to an embodiment
  • FIG. It is a top view which shows the 1st side part which concerns on embodiment.
  • FIG. 4 is a plan view schematically showing a power storage device according to a comparative example
  • FIG. 4 is a block diagram showing a state of a selector section when a control section according to an embodiment makes a first determination
  • FIG. 11 is a block diagram showing a state of a selector unit when a control unit according to modification 1 makes a first determination
  • FIG. 11 is a block diagram showing states of a selector unit when a control unit according to Modification 2 makes a first determination and a second determination;
  • the auxiliary power supply can be used for several minutes. It is required to supply power to the drive system from the vehicle, assist the running of the moving body, and safely stop the moving body. Therefore, the secondary power supply is sometimes required to have a high output that is not normally used. Such a demand for high output performance of the secondary power supply leads to an increase in the size and weight of the secondary power supply, which is also a factor in increasing the price of the secondary power supply.
  • a power supply system is a power supply system provided in a mobile body, comprising a main power supply having a plurality of power storage elements and connected to a drive system for moving the mobile body, is a backup power supply configured to be connected to an auxiliary equipment system of the moving body.
  • the first element group including at least one storage element, which forms part of the plurality of storage elements provided in the main power supply can be used as a backup power supply for the auxiliary equipment system. That is, in the first element group, power supply to the drive system and backup power supply are combined. Therefore, there is no need to provide a dedicated power supply for backup of the auxiliary equipment system. Furthermore, even when the main power supply fails, the drive system can be driven by the power supply from the first element group, which is a backup power supply, in addition to the power supply from the sub power supply. In other words, there is no need to employ a high-output secondary power source, and the secondary power source can be made lighter and smaller. For these reasons, it is possible to reduce the weight and space of the system as a whole.
  • a second element group including at least one storage element other than the storage elements included in the first element group among the plurality of storage elements is a backup configured to be connected to an auxiliary equipment system of the moving body. power supply.
  • each of the first element group and the second element group is a backup power supply for the auxiliary system.
  • the first element group includes a failed storage element, there is a high possibility that all the storage elements remain normal in the second element group.
  • backup power can be supplied from the second element group to the accessory system. Therefore, it is possible to improve the reliability of the backup power supply.
  • the power supply system decides to use one of the first element group and the second element group as a backup power supply based on the respective states of the first element group and the second element group. You may have a part.
  • the determination unit determines the element group to be used based on the respective states of the first element group and the second element group, it is possible to select the element group suitable as the backup power source at the present time. can. Therefore, the reliability of the backup power supply can be further enhanced.
  • the backup power supply may be connected to the drive system via the auxiliary equipment system.
  • the power supply from the main power supply to the drive system may be cut off.
  • power can be supplied from the backup power source to the drive system via the auxiliary system.
  • the drive system can be driven in an auxiliary manner. For example, the moving body can be moved to a road shoulder that does not interfere with other moving bodies.
  • the power supply system includes a secondary power supply connected to the auxiliary equipment system, and when the backup power supply supplies power to the drive system, the auxiliary power supply also supplies power to the drive system via the auxiliary equipment system. Power may be supplied.
  • Each of the plurality of power storage elements may have two sets of positive terminals and negative terminals.
  • each storage element has two pairs of positive and negative terminals, one pair of positive and negative terminals is connected to the drive system, and the other pair of positive and negative terminals is supplemented. It can be connected to the machine system, and the circuit configuration can be simplified.
  • a backup configured such that a first element group including at least one storage element of a main power supply having a plurality of storage elements according to an aspect of the present invention and connected to a drive system is connected to an auxiliary system
  • a control method for a power system provided in a mobile body, which is a power source is a method for controlling a power system provided in a mobile body, when an abnormality occurs in the main power supply to at least one of the accessory system and the drive system, Electric power is supplied from the backup power supply to the system in which the abnormality has occurred, out of the auxiliary equipment system and the drive system.
  • the first element group including at least one storage element, which forms part of the plurality of storage elements provided in the main power supply can be used as a backup power supply. That is, in the first element group, power supply to the drive system and backup power supply are combined.
  • the main power supply to the drive system In a normal state, power is supplied mainly from the main power supply to the drive system, and power is mainly supplied from the auxiliary power supply to the auxiliary equipment system.
  • the main power supply to at least one of the auxiliary system and the drive system It can be called a case where an abnormality occurs in the power supply.
  • power may be supplied from the backup power supply to the drive system.
  • the backup power supply is supplied to each of the auxiliary equipment system and the drive system. supply power.
  • FIG. 1 is a block diagram showing a control configuration of a power supply system 1 according to an embodiment. Arrows in FIG. 1 indicate the flow of power.
  • a power supply system 1 is mounted on a mobile object 2 and is a system that supplies electric power to a drive system 3 and an auxiliary equipment system 4 of the mobile object 2 .
  • examples of the mobile object 2 include automobiles, motorcycles, watercraft, ships, snowmobiles, agricultural machinery, construction machinery, and rail vehicles for electric railways.
  • Vehicles include electric vehicles (EV), hybrid electric vehicles (HEV), plug-in hybrid electric vehicles (PHEV), and the like.
  • EV electric vehicles
  • HEV hybrid electric vehicles
  • PHEV plug-in hybrid electric vehicles
  • an electric vehicle will be exemplified as the moving body 2 for explanation.
  • the moving body 2 has a drive system 3 and an auxiliary equipment system 4 .
  • the drive system 3 is provided with a motor 6 for driving the drive wheels 5 , and the motor 6 is electrically connected to the power supply system 1 .
  • the auxiliary equipment system 4 is provided with an operation function unit 7, a utility unit 8, and an ECU (Electronic Control Unit) 9.
  • the operation function unit 7, the utility unit 8 and the ECU 9 are electrically connected to the power supply system 1. It is connected to the.
  • the operation function unit 7 is a part that takes charge of the operation function of the moving body 2. Specifically, the driving function unit 7 has an electric brake unit for operating the brake of the moving body 2 and a steering unit for operating the steering. When the moving body 2 has an automatic driving function, the driving function unit 7 has an automatic driving unit that operates each mechanism that executes the automatic driving function. The driving function unit 7 may also include units for executing driving functions other than those exemplified here.
  • the utility section 8 is a section that operates for purposes other than the driving and operating functions of the moving body 2 .
  • the utility section 8 has a light, an air conditioner, a car navigation system, and the like.
  • the utility section 8 may also include sections that operate for purposes other than those exemplified here.
  • the ECU 9 includes a CPU (Central Processing Unit) and a memory (not shown).
  • the CPU executes predetermined arithmetic processing based on information stored in the memory, and controls each part of the mobile body 2 based on the arithmetic result. .
  • the power supply system 1 includes a main power supply 11 , a sub power supply 12 , a DC/DC converter 13 and a control device 14 .
  • the main power supply 11 is electrically connected to the drive system 3 .
  • the main power supply 11 has a plurality of element groups 20 .
  • Each element group 20 includes, for example, a first element group 21, a second element group 22, . . . , an Nth element group 2N, as shown in FIG.
  • Each element group 20 includes a plurality of storage elements 10 (see FIG. 2).
  • the number of power storage elements 10 included in each element group 20 is the same. Details of the storage element 10 will be described later.
  • Each element group 20 is provided with a sensor 30 that detects the state of the element group 20 .
  • the sensor 30 is, for example, a voltage sensor that detects the overall voltage of the element group 20 or a temperature sensor that detects the temperature of at least one storage element 10 included in the element group 20 .
  • the sensor 30 is a voltage sensor, it can be determined that the element group 20 is abnormal when the overall voltage of the element group 20 to be detected is less than a predetermined value, and the overall voltage of the element group 20 is less than the predetermined value. It can be judged that the element group 20 is normal when it is equal to or more than the value.
  • the sensor 30 is a temperature sensor, it can be determined that the element group 20 is abnormal when at least one power storage element 10 included in the element group 20 to be detected reaches a predetermined temperature or higher. It can be determined that the element group 20 is normal if the electric storage element 10 having a temperature equal to or higher than the predetermined temperature is not included.
  • the sub power supply 12 is electrically connected to the auxiliary system 4 .
  • the auxiliary power supply 12 is, for example, a lithium ion secondary battery or a lead secondary battery, and charges electricity with a voltage capable of operating the operation function unit 7, the utility unit 8, and the ECU 9, and discharges it to the outside. It is possible.
  • the DC/DC converter 13 is a converter electrically connected to the drive system 3 and the auxiliary equipment system 4 .
  • the DC/DC converter 13 converts the electricity into a voltage suitable for the auxiliary system 4 and supplies the electricity from the auxiliary system 4 to the drive system 3 .
  • the electricity is converted into a voltage suitable for the drive system 3 .
  • the control device 14 has a control section 15 and a selector section 16 .
  • the control unit 15 includes a CPU, a RAM, and a ROM, and the CPU controls each unit by loading a program stored in the ROM into the RAM and executing the program.
  • control unit 15 is electrically connected to each sensor 30 and determines whether each element group 20 is normal or abnormal based on the detection result of each sensor 30 .
  • the control unit 15 determines that stable power supply from the main power supply 11 to the drive system 3 cannot be performed (first determination).
  • An abnormality sensor 17 that detects an abnormality in the sub power supply 12 is electrically connected to the control unit 15 .
  • the control section 15 determines that the electrode cannot be stably supplied from the sub power supply 12 (second determination).
  • the control unit 15 changes control over the selector unit 16 based on the presence or absence of the first judgment or the second judgment.
  • the selector section 16 has a plurality of switch sections 161 connected to each element group 20 .
  • Each switch unit 161 is electrically arranged in parallel and connected to the accessory system 4 .
  • Each switch section 161 is opened and closed under the control of the control section 15 . A method of controlling the selector unit 16 by the control unit 15 will be described later.
  • Electric storage element 10 with switch unit 161 closed is electrically connected to auxiliary equipment system 4 , so that it is used as a backup power supply for auxiliary equipment system 4 .
  • the storage device 10 of the present invention can be used even if it has a battery structure in which each device has one positive electrode terminal and one negative electrode terminal. If there are two electric storage elements 10 per element, the degree of freedom in configuration can be increased.
  • FIG. 2 is a perspective view showing the appearance of the storage device 10 according to this embodiment.
  • FIG. 3 is an exploded perspective view showing each component by disassembling the electric storage device 10 according to the present embodiment.
  • the direction along the winding axis of the electrode body, the extending direction of the electrode body, or the facing direction of the short side of the container is defined as the X-axis direction.
  • the direction facing the long side of the container or the thickness direction of the container is defined as the Y-axis direction.
  • the direction in which the bottom surface of the container body and the top surface of the lid of the container are aligned, or the vertical direction is defined as the Z-axis direction.
  • the X-axis direction is an example of a first direction
  • the Z-axis direction is an example of a second direction.
  • the X-axis plus direction indicates the arrow direction of the X-axis
  • the X-axis minus direction indicates the direction opposite to the X-axis plus direction.
  • the Y-axis direction and the Z-axis direction are not strictly the directions or orientations.
  • two directions are orthogonal not only means that the two directions are completely orthogonal, but also substantially orthogonal, that is, for example, a difference of about several percent It is also meant to include
  • the electric storage element 10 is an electric storage element that can be charged with electricity from the outside and discharged with electricity to the outside, and has a substantially rectangular parallelepiped shape in the present embodiment.
  • the storage element 10 is not limited to a non-aqueous electrolyte secondary battery, and may be a secondary battery other than a non-aqueous electrolyte secondary battery.
  • the storage element 10 may be a battery using a solid electrolyte.
  • the electric storage element 10 may be a pouch-type electric storage element.
  • the power storage element 10 substantially rectangular parallelepiped
  • the power storage element 10 is illustrated based on a flat rectangular parallelepiped shape. , and may be a shape based on a polygonal prismatic shape, an oval cylindrical shape, an elliptical cylindrical shape, a cylindrical shape, or the like, other than a rectangular parallelepiped.
  • the storage element 10 includes a container 100, two pairs of electrode terminals 300, and two pairs of external gaskets 400. Inside the container 100, two pairs of internal gaskets 500, two pairs of current collectors 600, and an electrode assembly 700 are accommodated. Specifically, a pair of (positive electrode and negative electrode) members (a pair of electrode terminals 300, a pair of external gaskets 400, a pair of internal gaskets 500 and a pair of current collector 600, etc., and so on) are arranged, and the remaining pair of members (a positive electrode and a negative electrode) are arranged at the other end of the container 100 in the negative direction of the X axis.
  • a pair of (positive electrode and negative electrode) members a pair of electrode terminals 300, a pair of external gaskets 400, a pair of internal gaskets 500 and a pair of current collector 600, etc., and so on
  • the remaining pair of members are arranged at the other end of the container 100 in the negative direction of the X axis.
  • the positive electrode members are arranged in the positive Z-axis direction, and the negative electrode members are arranged in the negative Z-axis direction.
  • the first side surface portion 110 is a range from the end face of the container 100 in the positive direction of the X-axis where the members of the positive electrode and the negative electrode in the positive direction of the X-axis are arranged.
  • the first side surface portion 110 is a portion within a range of 1% to 10% of the length of the container 100 from the end surface of the container 100 in the positive X-axis direction in the X-axis direction.
  • the negative electrode members are arranged in the Z-axis positive direction, and the positive electrode members are arranged in the Z-axis negative direction.
  • the second side surface portion 120 is a range from the end face of the container 100 in the negative direction of the X-axis where the members of the positive electrode and the negative electrode in the negative direction of the X-axis are arranged.
  • the second side surface portion 120 is a portion within a range of 1% to 10% of the length of the container 100 from the end surface of the container 100 in the negative X-axis direction in the X-axis direction.
  • each member of the positive electrode and each member of the negative electrode are reversed (vertically reversed) when viewed from the direction along the winding axis (viewed from the X-axis direction). are arranged as follows.
  • An electrolytic solution (non-aqueous electrolyte) is sealed inside the container 100, but illustration is omitted.
  • the type of the electrolytic solution as long as it does not impair the performance of the storage element 10, and various types can be selected.
  • spacers arranged on the sides, above, or below the electrode body 700, insulating films wrapping the electrode body 700 and the like, and the like may be arranged.
  • the container 100 is a case having an external shape (substantially rectangular parallelepiped shape) based on a rectangular parallelepiped shape that is long and flat in the X-axis direction.
  • the container 100 has a length in the X-axis direction that is at least three times the length in the Z-axis direction.
  • the reference rectangular parallelepiped shape is indicated by a chain double-dashed line L1.
  • the container 100 has a rectangular parallelepiped shape that is long and flat in the X-axis direction, and has an outer shape in which rectangular notches are formed at the upper and lower ends of both ends in the X-axis direction.
  • each notch forms a concave portion when viewed from the reference rectangular parallelepiped shape.
  • a pair of notches located in the upper part of the container 100 each form a first recess 101
  • a pair of notches located in the lower part of the container 100 respectively form a second recess 102. That is, the first recess 101 and the second recess 102 are formed at different positions in the Z-axis direction so as to face each other in the Z-axis direction on the first side surface portion 110 and the second side surface portion 120 of the container 100, respectively.
  • Electrode terminals 300 are arranged in each of the first recess 101 and the second recess 102 .
  • the (whole) electrode terminal 300 in the first concave portion 101 and the second concave portion 102 face each other in the Z-axis direction.
  • the two recesses 102 and (the entirety of) the electrode terminals 300 in the first recesses 101 face each other in the Z-axis direction.
  • the first side surface 110 has a first upper side surface 111, a first upper surface 112, a first middle side surface 113, a first lower surface 114, and a first lower side surface 115.
  • the first upper side surface 111 is arranged above the first side surface portion 110 and is a rectangular plane parallel to the YZ plane and elongated in the Z-axis direction.
  • the first upper surface 112 is a plane extending in the positive X-axis direction from the lower end of the first upper side surface 111 and is a rectangular plane parallel to the XY plane and elongated in the X-axis direction.
  • the first middle side surface 113 is a plane extending downward from the end of the first upper surface 112 in the positive X-axis direction, and is a rectangular plane parallel to the YZ plane and elongated in the Z-axis direction.
  • the first lower surface 114 is a flat surface extending in the negative direction of the X-axis from the lower end of the first middle surface 113, and is a rectangular flat surface parallel to the XY plane and elongated in the X-axis direction.
  • the first lower side surface 115 is a flat surface extending downward from the end of the first lower surface 114 in the negative X-axis direction, and is a rectangular flat surface parallel to the YZ plane and elongated in the Z-axis direction.
  • the first concave portion 101 of the first side surface portion 110 is formed by a first upper side surface 111 and a first upper surface 112, and the end portion in the positive direction of the Z axis and the end portion in the positive direction of the X axis are open.
  • the second concave portion 102 of the first side surface portion 110 is formed from a first lower surface 114 and a first lower side surface 115, and is open at the end in the negative direction of the Z axis and the end in the positive direction of the X axis. ing.
  • the surfaces in the X-axis direction and the Z-axis direction are recessed, and the Y It has a shape that penetrates in the axial direction.
  • the surfaces in the X-axis direction and the Z-axis direction are recessed, and the Y It has a shape that penetrates in the axial direction.
  • the first recessed portion 101 of the first side surface portion 110 is recessed (cut into a square shape (L shape) at the corners of the container 100 in the positive direction of the X axis and the positive direction of the Z axis when viewed from the Y axis direction. missing) recess.
  • the second concave portion 102 of the first side surface portion 110 is recessed (notched) into a square shape (L shape) when viewed from the Y axis direction at the corners of the container 100 in the positive direction of the X axis and the negative direction of the Z axis. ) is a recess.
  • the second side surface portion 120 has a second upper side surface 121, a second upper surface 122, a second intermediate side surface 123, a second lower surface 124, and a second lower side surface 125. It is long in the Z-axis direction.
  • the second upper side surface 121 is arranged above the second side surface portion 120 and is a rectangular plane parallel to the YZ plane and elongated in the Z-axis direction.
  • the second upper surface 122 is a plane extending in the negative direction of the X-axis from the lower end of the second upper side surface 121 and is a rectangular plane parallel to the XY plane and elongated in the X-axis direction.
  • the second middle side surface 123 is a plane extending downward from the end of the second upper surface 122 in the negative X-axis direction, and is a rectangular plane parallel to the YZ plane and elongated in the Z-axis direction.
  • the second lower surface 124 is a flat surface extending in the positive direction of the X-axis from the lower end of the second intermediate surface 123, and is a rectangular flat surface parallel to the XY plane and elongated in the X-axis direction.
  • the second lower side surface 125 is a flat surface extending downward from the end of the second lower surface 124 in the negative X-axis direction, and is a rectangular flat surface parallel to the YZ plane and elongated in the Z-axis direction.
  • the first concave portion 101 of the second side surface portion 120 is formed by a second upper side surface 121 and a second upper surface 122, and the end portion in the positive direction of the Z axis and the end portion in the negative direction of the X axis are open.
  • the second concave portion 102 of the second side surface portion 120 is formed from a second lower surface 124 and a second lower side surface 125, and the end portion in the negative direction of the Z axis and the end portion in the negative direction of the X axis are open.
  • the surfaces in the X-axis direction and the Z-axis direction are recessed, and the Y It has a shape that penetrates in the axial direction.
  • the surfaces in the X-axis direction and the Z-axis direction are recessed, and the Y It has a shape that penetrates in the axial direction.
  • the first recessed portion 101 of the second side surface portion 120 is a recessed portion in which the corners of the container 100 in the negative direction of the X-axis and the positive direction of the Z-axis are recessed (notched) in a square shape when viewed from the Y-axis direction.
  • the second recessed portion 102 of the second side surface portion 120 is a recessed portion in which the corner portion of the container 100 in the negative X-axis direction and the negative Z-axis direction is recessed (notched) in a quadrangular shape when viewed from the Y-axis direction.
  • each long side surface 130 is a plane parallel to the XZ plane and elongated in the X-axis direction, and both ends in the X-axis direction have shapes corresponding to the first side surface portion 110 and the second side surface portion 120 .
  • the end surface in the positive Z-axis direction is the top surface 140 and the end surface in the negative Z-axis direction is the bottom surface 150 .
  • the top surface 140 is a rectangle parallel to the XY plane and elongated in the X-axis direction, connecting the upper end of the first upper side surface 111 of the first side surface portion 110 and the upper end of the second upper side surface 121 of the second side surface portion 120 . It is a plane of shape.
  • the bottom surface 150 connects the lower end of the first lower side surface 115 of the first side surface portion 110 and the lower end of the second lower side surface 125 of the second side surface portion 120 and is parallel to the XY plane and elongated in the X-axis direction. It is a plane of shape.
  • the container 100 has a container body 160 and a lid 170, and the container body 160 and the lid 170 are assembled to form a substantially rectangular parallelepiped shape.
  • the container body 160 has a pair of long side surfaces 130 and a bottom surface 150 .
  • the lid 170 has a first upper side 111 , a first upper side 112 , a first middle side 113 , a first lower side 114 , a first lower side 115 , a second upper side 121 and a second upper side 122 . , a second middle side surface 123 , a second lower surface 124 , a second lower side surface 125 and a top surface 140 .
  • the container body 160 is a substantially U-shaped sheet metal with an open top when viewed in the X-axis direction.
  • the container body 160 has flat plate-like long side walls forming a pair of long side surfaces 130 at both ends in the Y-axis direction, and a flat rectangular bottom forming a bottom surface 150 at the end in the negative Z-axis direction. It has a wall.
  • the lid 170 is a sheet metal with an open bottom when viewed in the Y-axis direction.
  • the lid body 170 has a bent plate portion forming a first upper side surface 111, a first upper surface 112, a first middle side surface 113, a first lower surface 114, and a first lower side surface 115 at the end in the positive direction of the X axis.
  • the container 100 has a structure in which the inside is sealed by joining the container body 160 and the lid 170 by welding or the like after the electrode body 700 and the like are accommodated inside the container body 160. ing.
  • the material of container 100 is not particularly limited, but weldable metals such as stainless steel, aluminum, aluminum alloy, iron, and plated steel plate are preferable.
  • the lid body 170 is formed with a liquid injection part and a gas discharge valve.
  • the gas discharge valve is a safety valve that releases the pressure when the pressure inside the container 100 rises excessively.
  • the injection part is a part for injecting an electrolytic solution into the inside of the container 100 when the electric storage element 10 is manufactured.
  • the electrode terminal 300 is a terminal (a positive electrode terminal 310 and a negative electrode terminal 320) electrically connected to the electrode body 700 via the current collector 600. That is, the electrode terminal 300 leads the electricity stored in the electrode body 700 to the external space of the storage element 10 and introduces the electricity into the internal space of the storage element 10 to store the electricity in the electrode body 700 .
  • the material of the electrode terminal 300 is not particularly limited, for example, the electrode terminal 300 (the positive terminal 310 and the negative terminal 320) is made of a conductive material such as aluminum, aluminum alloy, copper, or copper alloy.
  • the electrode terminal 300 is connected (joined) to the current collector 600 and attached to the lid 170 by caulking, welding, or the like.
  • the electrode terminal 300 has a terminal body portion 330 and a shaft portion 340 protruding from the terminal body portion 330 .
  • the terminal main body portion 330 is a portion that protrudes outward from the terminal installation surface of the container 100 .
  • the terminal installation surface is the first upper surface 112, the first lower surface 114, the second upper surface 122, or the second lower surface 124.
  • FIG. The terminal body portion 330 protrudes outward from the container 100 along the Z-axis direction on any of the terminal installation surfaces.
  • Through-holes 112a, 114a, 122a, and 124a through which the shaft portion 340 penetrates are formed in portions of the cover 170 corresponding to the respective terminal installation surfaces.
  • the shaft portion 340 is connected (joined) to the current collector 600 by crimping while penetrating the terminal installation surface, the outer gasket 400 , the inner gasket 500 and the current collector 600 .
  • the positional relationship between the terminal body portion 330 and each recess (the first recess 101 and the second recess 102) after joining will be described later.
  • the current collectors 600 are arranged in pairs on both sides of the electrode assembly 700 in the X-axis direction, and are connected (joined) to the electrode assembly 700 and the electrode terminals 300 to electrically connect the electrode assembly 700 and the electrode terminals 300. They are conductive current collectors (positive electrode current collector 610 and negative electrode current collector 620). Specifically, the current collector 600 includes a first joint portion 630 that is connected (joined) to a tab portion 720 of the electrode body 700 described later by welding or crimping, and as described above, the electrode terminal 300 is crimped. Alternatively, it integrally has a second joint portion 640 that is connected (joined) by welding or the like.
  • Each of the first joint portion 630 and the second joint portion 640 is a plate-like portion, and is formed by bending a single sheet metal.
  • the material of the current collector 600 is not particularly limited.
  • 620 is formed of a conductive member such as copper or copper alloy, like the negative electrode base material 751 of the electrode body 700 described later.
  • the external gasket 400 is disposed between the lid 170 of the container 100 and the electrode terminal 300 , and is a plate-shaped and rectangular insulating seal that insulates and seals between the lid 170 and the electrode terminal 300 . It is a stop member.
  • the internal gasket 500 is a plate-shaped rectangular insulating seal disposed between the lid 170 and the current collector 600 to insulate and seal between the lid 170 and the current collector 600 . It is a member.
  • the outer gasket 400 and the inner gasket 500 are made of, for example, polypropylene (PP), polyethylene (PE), polystyrene (PS), polyphenylene sulfide resin (PPS), polyphenylene ether (PPE (including modified PPE)), polyethylene terephthalate (PET) ), polybutylene terephthalate (PBT), polyetheretherketone (PEEK), tetrafluoroethylene-perfluoroalkyl vinyl ether (PFA), polytetrafluoroethylene (PTFE), polyethersulfone (PES), ABS resin, or It is formed of a resin or the like having electrical insulation such as a composite material thereof.
  • PP polypropylene
  • PE polyethylene
  • PS polystyrene
  • PPS polyphenylene sulfide resin
  • PPE polyphenylene ether
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PEEK polyetheretherketone
  • the electrode body 700 is a storage element (power generation element) formed by winding an electrode plate and capable of storing electricity.
  • the electrode body 700 has an elongated shape extending in the X-axis direction, and has an oval shape when viewed from the X-axis direction.
  • the electrode body 700 has a shape with a length in the X-axis direction of, for example, 300 mm or more, specifically about 500 mm to 1500 mm. Therefore, the electrode body 700 is longer in the X-axis direction than in the Z-axis direction.
  • the electrode body 700 has a length in the X-axis direction that is at least three times the length in the Z-axis direction.
  • the electrode assembly 700 has a body portion 710 and a plurality of tab portions 720 protruding from the body portion 710 , and the tab portions 720 are connected (joined) to the current collector 600 as described above.
  • the tab portion 720 is an example of a connection portion connected to the current collector 600 .
  • the plurality of tab portions 720 protrude in pairs from each of both end surfaces of the body portion 710 in the X-axis direction.
  • a positive electrode tab portion 721 is provided on one end face of the main body portion 710 in the positive direction of the X-axis at a predetermined distance from the end in the positive direction of the Z-axis, and a predetermined distance from the end in the negative direction of the Z-axis.
  • Negative electrode tab portions 722 are provided at intervals.
  • a negative electrode tab portion 722 is provided on the other end surface of the main body portion 710 in the negative direction of the X-axis at a predetermined distance from the end in the positive direction of the Z-axis, and a predetermined distance from the end in the negative direction of the Z-axis.
  • a positive electrode tab portion 721 is provided at an interval. That is, on one end surface and the other end surface of the main body portion 710, the positive electrode tab portion 721 and the negative electrode tab portion 722 are arranged to be reversed (upside down) when viewed from the direction along the winding axis (viewed from the X-axis direction). It is
  • the positive electrode tab portion is provided only at one end portion in the X-axis direction
  • the negative electrode tab portion is provided only at the other end portion in the X-axis direction.
  • the distance between the positive electrode tab portion and the negative electrode tab portion is increased. This is not preferable because it induces an increase in electrical resistance and the occurrence of reaction unevenness.
  • a positive electrode tab portion 721 and a negative electrode tab portion 722 are provided on one end surface and the other end surface of main body portion 710 of electrode body 700, respectively.
  • the distance between the positive electrode tab portion 721 and the negative electrode tab portion 722 is shortened at each end surface of the main body portion 710, thereby suppressing an increase in electrical resistance and occurrence of uneven reaction.
  • the configuration of such electrode assembly 700 will be described in detail below.
  • FIG. 4 is a perspective view showing the configuration of electrode assembly 700 according to the present embodiment. Specifically, FIG. 4 shows the configuration of the electrode assembly 700 in which the electrode plates are partially unfolded. As shown in FIG. 4, the electrode body 700 has a positive electrode plate 740, a negative electrode plate 750, and separators 761 and 762. As shown in FIG.
  • the positive electrode plate 740 is an electrode plate (electrode plate) in which a positive electrode active material layer 742 is formed on the surface of a positive electrode base material 741, which is a long strip-shaped metal foil made of aluminum, an aluminum alloy, or the like.
  • the negative electrode plate 750 is an electrode plate (electrode plate) in which a negative electrode active material layer 752 is formed on the surface of a negative electrode base material 751 which is a long belt-shaped metal foil made of copper, copper alloy, or the like.
  • the positive electrode base material 741 and the negative electrode base material 751 nickel, iron, stainless steel, titanium, calcined carbon, conductive polymer, conductive glass, Al—Cd alloy, etc., which are stable against oxidation-reduction reactions during charging and discharging. As long as it is a material, a known material can be used as appropriate.
  • the positive electrode active material used for the positive electrode active material layer 742 and the negative electrode active material used for the negative electrode active material layer 752 are appropriately known materials as long as they are positive electrode active materials and negative electrode active materials capable of intercalating and deintercalating lithium ions. can be used.
  • polyanion compounds such as LiMPO 4 , LiMSiO 4 , LiMBO 3 (M is one or more transition metal elements selected from Fe, Ni, Mn, Co, etc.), lithium titanate, Spinel-type lithium manganese oxides such as LiMn 2 O 4 and LiMn 1.5 Ni 0.5 O 4 , LiMO 2 (M is one or more transition metals selected from Fe, Ni, Mn, Co, etc. element) and the like can be used.
  • negative electrode active materials include lithium metal, lithium alloys (lithium-silicon, lithium-aluminum, lithium-lead, lithium-tin, lithium-aluminum-tin, lithium-gallium, and lithium metal-containing alloys such as Wood's alloys). , alloys that can absorb and release lithium, carbon materials (e.g. graphite, non-graphitizable carbon, easily graphitizable carbon, low-temperature fired carbon, amorphous carbon, etc.), silicon oxides, metal oxides, lithium metal oxides ( Li 4 Ti 5 O 12 , etc.), polyphosphate compounds, or compounds of transition metals and group 14 to group 16 elements, such as Co 3 O 4 and Fe 2 P, which are generally called conversion negative electrodes. .
  • lithium alloys lithium-silicon, lithium-aluminum, lithium-lead, lithium-tin, lithium-aluminum-tin, lithium-gallium, and lithium metal-containing alloys such as Wood's alloys.
  • the separators 761 and 762 are microporous sheets made of resin.
  • any well-known material can be appropriately used as long as the performance of the electric storage element 10 is not impaired.
  • a woven fabric, a non-woven fabric, a synthetic resin microporous film made of a polyolefin resin such as polyethylene, etc., which is insoluble in an organic solvent, or the like can be used.
  • the electrode body 700 is formed by alternately stacking and winding positive electrode plates 740 and negative electrode plates 750 and separators 761 and 762 . That is, the electrode body 700 is formed by laminating the negative electrode plate 750, the separator 761, the positive electrode plate 740, and the separator 762 in this order and winding them.
  • the electrode body 700 is a wound electrode body formed by winding a positive electrode plate 740, a negative electrode plate 750, and the like around a winding axis L extending in the X-axis direction.
  • the winding axis L is a virtual axis that serves as a central axis when the positive electrode plate 740, the negative electrode plate 750, and the like are wound. They are parallel straight lines.
  • a plurality of protruding pieces 743 protruding outward are arranged at intervals from both ends of the positive electrode plate 740 in the direction of the winding axis.
  • a plurality of projecting pieces 753 projecting outward are arranged at intervals from both ends of the negative electrode plate 750 in the direction of the winding axis.
  • each projecting piece 743 of the positive electrode plate 740 and each projecting piece 753 of the negative electrode plate 750 are alternately arranged every two in the longitudinal direction of the positive electrode plate 740 and the negative electrode plate 750 .
  • Each of the projecting pieces 743 and 753 is a portion (active material layer non-formation portion) where the base layer is exposed without forming the active material layer containing the active material.
  • a positive electrode tab portion 721 is a portion where the projecting pieces 743 of the positive electrode plate 740 are overlapped with each other. That is, the positive electrode tab portion 721 is formed by stacking a plurality of pieces (protruding pieces 743) of the electrode plates (the positive electrode plate 740) having the same polarity among the plurality of electrode plates (the positive electrode plate 740 and the negative electrode plate 750). It is a part.
  • the portion where the projecting pieces 753 of the negative electrode plate 750 overlap with each other is the negative electrode tab portion 722 . That is, the negative electrode tab portion 722 is formed by stacking a plurality of pieces (protruding pieces 753) of the electrode plates (the negative electrode plate 750) having the same polarity among the plurality of electrode plates (the positive electrode plate 740 and the negative electrode plate 750). It is a part.
  • the electrode body 700 includes a main body portion 710 constituting the main body of the electrode body 700, and a plurality of tab portions 720 (a positive electrode tab portion 721 and a negative tab portion 722).
  • the body portion 710 is formed by winding a portion of the positive electrode plate 740 and the negative electrode plate 750 on which the positive electrode active material layer 742 and the negative electrode active material layer 752 are formed (coated) and separators 761 and 762 .
  • This is a columnar portion (active material layer forming portion).
  • the body portion 710 has a pair of curved portions 711 on both sides in the Z-axis direction, and has a flat portion 712 that is flat as a whole between the pair of curved portions 711 . It can also be said that the pair of curved portions 711 are arranged at positions sandwiching the flat portion 712 in the Z-axis direction.
  • the curved portion 711 is curved in a semicircular arc shape so as to protrude in the Z-axis direction when viewed from the X-axis direction, and is a curved portion extending in the X-axis direction. 170 is arranged opposite to the ceiling wall portion.
  • the pair of curved portions 711 are portions curved so as to protrude from the flat portion 712 toward both sides in the Z-axis direction toward the bottom wall portion of the container body 160 and the top wall portion of the lid body 170 when viewed from the X-axis direction. is.
  • the flat portion 712 is a rectangular and flat portion that connects the ends of the pair of curved portions 711 and spreads parallel to the XZ plane facing the Y-axis direction. placed facing the part.
  • the flat portion 712 is a main portion of the electrode body 700, and in the flat portion 712, a plurality of wound electrode plates (positive electrode plate 740 and negative electrode plate 750) are laminated in the Y-axis direction. That is, in the flat portion 712, the Y-axis direction is the stacking direction of the plurality of electrode plates.
  • the flat portion 712 is the main portion of the electrode body 700, so in the present disclosure, the main stacking direction of the electrode body 700 is defined as the Y-axis direction.
  • the curved shape of the curved portion 711 is not limited to a semicircular arc shape, and may be a part of an elliptical shape or the like, and may be curved in any way.
  • the flat portion 712 is not limited to having a flat outer surface facing the Y-axis direction, and the outer surface may be slightly concave or slightly bulging.
  • FIG. 5 is a plan view showing the first side surface portion 110 according to this embodiment.
  • the reference rectangular parallelepiped shape of the container 100 is indicated by chain double-dashed lines L2 and L3. Therefore, “inside the first concave portion 101” means the area defined by the reference rectangular parallelepiped outline (chain two-dotted line L2), the first upper side surface 111, and the first upper surface 112. .
  • “inside the second concave portion 102” refers to an area defined by the reference rectangular parallelepiped contour (chain two-dotted line L3), the first lower surface 114, and the first lower side surface 115. be.
  • the bus bar 900 is a plate-shaped conductive member extending in the Y-axis direction, and is joined to the electrode terminals 300 of other storage elements.
  • the Z-axis plus direction bus bar 900 is electrically connected to the drive system 3 .
  • the bus bar 900 in the negative Z-axis direction is electrically connected to the accessory system 4 .
  • the terminal body portion 330 of the positive electrode terminal 310 protrudes outward through the external gasket 400 from the first upper surface 112, which is the terminal installation surface.
  • the entire terminal main body portion 330 of the positive electrode terminal 310 is accommodated in the first concave portion 101 as viewed in the Y-axis direction. That is, the terminal main body portion 330 of the positive electrode terminal 310 is arranged below the top surface 140 as a whole.
  • bus bar 900 joined to positive electrode terminal 310 is also entirely accommodated in first recess 101 when viewed in the Y-axis direction, and is arranged below top surface 140 .
  • the busbar 900 for the drive system 3 is arranged inside each of the first concave portions 101 of the plurality of power storage elements 10 . Since the busbar 900 for the drive system 3 can be arranged in the first recess 101 in this way, it is possible to suppress the busbar 900 for the drive system 3 from protruding outside the container 100 . Therefore, it is possible to improve the space efficiency outside the power storage element 10 .
  • a positive electrode tab portion 721 and a negative electrode tab portion 722 of the electrode body 700 in the positive direction of the X axis are arranged between the first concave portion 101 and the second concave portion 102 in the first side surface portion 110 .
  • the positive electrode tab portion 721 and the negative electrode tab portion 722 are arranged at a position away from the portions forming the first upper side surface 111 and the first lower side surface 115, so that the main body portion 710 of the electrode body 700 is positioned at the first position.
  • a portion forming the upper side surface 111 and the first lower side surface 115 can be approached. Therefore, it is possible to form the body portion 710 as large as possible, which is a portion that contributes to power storage (power generation).
  • the current collector 600 joined to the positive electrode tab portion 721 extends in the Z-axis direction within a space overlapping the first upper surface 112, which is the terminal installation surface, when viewed from above.
  • the first joint portion 630 of the current collector 600 that is joined to the positive electrode tab portion 721 is a plate-like portion that extends in the Z-axis direction and is joined to the positive electrode tab portion 721 .
  • the second joint portion 640 of the current collector 600 is a plate-like portion bent from the upper end of the first joint portion 630 and joined to the shaft portion 340 of the positive electrode terminal 310 .
  • the first joint portion 630 and the second joint portion 640 are housed in a space overlapping the first upper surface 112 when the first upper surface 112 is viewed from above. In other words, the current collector 600 does not protrude from the space, and the first joint portion 630 and the positive electrode tab portion 721 are joined in the space, and these joint structures also do not protrude from the space.
  • the terminal main body portion 330 of the negative terminal 320 protrudes outward through the external gasket 400 from the first lower surface 114, which is the terminal installation surface.
  • the entire terminal body portion 330 of the negative terminal 320 is accommodated in the second recess 102 as viewed in the Y-axis direction. That is, the terminal main body portion 330 of the negative terminal 320 is arranged above the bottom surface 150 as a whole.
  • the bus bar 900 joined to the negative terminal 320 is also entirely accommodated in the second recess 102 when viewed in the Y-axis direction, and is arranged above the bottom surface 150 .
  • the bus bar 900 for the auxiliary equipment system 4 is arranged inside each of the second concave portions 102 of the plurality of power storage elements 10 . Since the busbar 900 for the accessory system 4 can be arranged in the second recess 102 in this way, the busbar 900 for the accessory system 4 can be prevented from protruding outside the container 100 . Therefore, it is possible to improve the space efficiency outside the power storage element 10 .
  • the second side surface portion 120 has the same configuration as the first side surface portion 110, so the terminal main body portion 330 and the bus bar 900 in each first concave portion 101 are arranged below the top surface 140. It does not protrude from the surface 140. Similarly, the terminal body portion 330 and the bus bar 900 in each second recess 102 are arranged above the bottom surface 150 and do not protrude from the bottom surface 150 .
  • the current collector 600 joined to the negative electrode tab portion 722 extends in the Z-axis direction within a space overlapping the first lower surface 114, which is the terminal installation surface, when viewed from above.
  • the first joint portion 630 of the current collector 600 that is joined to the negative electrode tab portion 722 is a plate-like portion that extends in the Z-axis direction and is joined to the negative electrode tab portion 722 .
  • the second joint portion 640 of the current collector 600 is a plate-like portion bent from the upper end of the first joint portion 630 and joined to the shaft portion 340 of the negative electrode terminal 320 .
  • the first joint portion 630 and the second joint portion 640 are housed in a space overlapping the first lower surface 114 when the first lower surface 114 is viewed from above.
  • the current collector 600 does not protrude from the space, and the first joint portion 630 and the negative electrode tab portion 722 are joined in the space, and these joint structures also do not protrude from the space.
  • the body portion 710 of the electrode body 700 can be arranged as large as possible because it does not protrude from the space.
  • FIG. 6 is a plan view schematically showing a power storage element 10Z according to a comparative example.
  • the container 100z is formed in a rectangular parallelepiped shape without having the first concave portion and the second concave portion. Therefore, in the comparative example, a pair of electrode terminals 300 are provided on the top surface 140z of the container 100z, and a pair of electrode terminals 300 are also provided on the bottom surface 150z.
  • the pair of electrode terminals 300 protrude from the top surface 140z, so the space between the pair of electrode terminals 300 is an extra space (dotted hatched portion in FIG. 6).
  • the bottom surface 150z since the pair of electrode terminals 300 protrude from the bottom surface 150z, the space between the pair of electrode terminals 300 becomes an extra space.
  • the terminal main body portion 330 in each first concave portion 101 does not protrude from the top surface 140, between the pair of electrode terminals 300 arranged in the upper part of the container 100, the Surplus space is reduced (see FIG. 5). Similarly, the extra space outside the container 100 is also reduced between the pair of electrode terminals 300 arranged in the lower portion of the container 100 .
  • the control unit 15 opens all the switch sections 161 provided in the selector section 16 .
  • the control section 15 opens all the switch sections 161 provided in the selector section 16 .
  • the motor 6 is driven, the drive wheels 5 are rotated, and the moving object travels.
  • power is supplied from the main power supply 11 to the auxiliary equipment system 4 via the DC/DC converter 13, and power is supplied from the auxiliary power supply 12 to the auxiliary equipment system 4.
  • Electric power is supplied to the utility section 8 and the ECU 9 .
  • the electric power generated by the motor 6 is stored in the main power supply 11 by the regenerative braking.
  • a part of this generated electric power is transmitted to auxiliary equipment system 4 via DC/DC converter 13 and stored in auxiliary power supply 12 .
  • FIG. 7 is a block diagram showing the state of selector section 16 when control section 15 according to the present embodiment makes the first determination.
  • the control unit 15 makes the first judgment based on the detection result of the sensor 30 whose detection target is the second element group 22 .
  • the control unit 15 selects at least one element group 20 (the first element group 21 in this embodiment) from among the normal element groups 20. is used as a backup power source. That is, the control unit 15 detects the state of each of the first element group 21 and the second element group 22, and backs up one of the first element group 21 and the second element group 22 based on the detection result. It is an example of the decision part which decides to use it as a power source.
  • the control unit 15 closes only the switch unit 161 of the first element group 21 that has been determined to be used as a backup power supply, and conducts the first element group 21 to the auxiliary equipment system 4 .
  • power is supplied from the first element group 21 to the drive system 3 via the auxiliary system 4 and the DC/DC converter 13 for a predetermined time.
  • power is also supplied from the auxiliary power supply 12 to the drive system 3 via the auxiliary equipment system 4 and the DC/DC converter 13 . Therefore, the motor 6 of the drive system 3 can be driven auxiliary although the voltage is significantly lower than the voltage in the normal state.
  • the moving body 2 can be moved to a road shoulder that does not interfere with other moving bodies.
  • the case where power is supplied from the auxiliary power supply 12 to the drive system 3 when power is supplied from the first element group 21 to the drive system 3 for a predetermined time is exemplified.
  • a predetermined condition includes a period of time until the moving body 2 moves to the shoulder of the road.
  • the main power supply 11 fails, not all of the plurality of storage elements 10 provided in the main power supply 11 fail, but only a few storage elements 10 out of them fail. Only the system has failed, and most of the storage elements 10 remain normal. For this reason, in the power supply system 1 according to the present embodiment, the first element group 21 including at least one storage element 10 forming a part of the plurality of storage elements 10 provided in the main power supply 11 is connected to the auxiliary equipment system 4 can be used as a backup power supply for That is, in the first element group 21, power supply to the drive system 3 and backup power supply are combined. Therefore, it becomes unnecessary to provide a dedicated power source for backup of the auxiliary equipment system 4 .
  • the drive system can be driven by the power supply from the first element group, which is a backup power supply, in addition to the power supply from the sub power supply.
  • the secondary power source can be made lighter and smaller. For these reasons, it is possible to reduce the weight and space of the system as a whole.
  • Each of the first element group 21 and the second element group 22 is a backup power source for the auxiliary system 4 .
  • the first element group 21 includes the failed storage element 10
  • backup power can be supplied from the second element group 22 to the auxiliary system 4 . Therefore, it is possible to improve the reliability of the backup power supply.
  • the control unit 15 (determining unit) detects the respective states of the first element group 21 and the second element group 22, and determines the element group 20 to be used for backup based on the detection result. It is possible to select an element group 20 suitable as a power source. Therefore, the reliability of the backup power supply can be further enhanced.
  • the power supply from the main power supply 11 to the drive system 3 may be interrupted.
  • power can be supplied from the first element group 21 as a backup power source to the drive system 3 via the auxiliary system 4 .
  • the motor 6 of the drive system 3 can be driven in an auxiliary manner, although the voltage is significantly lower than the normal voltage.
  • the moving body 2 can be moved to a road shoulder that does not interfere with other moving bodies.
  • the first element group 21 which is a backup power supply
  • the auxiliary power supply 12 supplies power to the drive system 3 for a predetermined period of time
  • power is also supplied from the auxiliary power supply 12 to the drive system 3 via the auxiliary system 4. It is possible to enhance the stability when the motor 6 of the system 3 is driven in an auxiliary manner.
  • each energy storage element 10 has two sets of positive terminal 310 and negative terminal 320, one set of positive terminal 310 and negative terminal 320 is connected to drive system 3, and the other set of positive terminal 310 and negative terminal 320 is connected to drive system 3.
  • 320 can be connected to the auxiliary equipment system 4, and the circuit configuration can be simplified.
  • FIG. 8 is a block diagram showing the state of the selector unit 16 when the control unit 15 according to Modification 1 makes the first determination.
  • the control unit 15 makes the first determination when at least one element group 20 included in the main power supply 11 is abnormal.
  • a state sensor 19 that detects the power supply state from the main power source 11 to the drive system 3 is provided outside the power supply system 1 . That is, the state sensor 19 collectively detects an abnormality in the power supply state caused by an abnormality in at least one element group 20 and an abnormality in the power supply state caused by an abnormality in the system or wiring system of the main power supply 11.
  • This state sensor 19 is electrically connected to the controller 15 .
  • the control unit 15 makes a first judgment when the state sensor 19 detects an abnormality in the power supply state. At this time, the control unit 15 determines the normal element group 20 based on the detection result of each sensor 30, and selects one element group 20 (the first element group 21 in this modification) for backup. Decide to use it as a power source.
  • the control unit 15 closes only the switch unit 161 of the first element group 21 that has been determined to be used as a backup power supply, and connects the first element group 21 to the auxiliary equipment system 4 . As a result, power is supplied from the first element group 21 to the drive system 3 via the auxiliary system 4 and the DC/DC converter 13 for a predetermined time.
  • the motor 6 of the drive system 3 can be driven auxiliary although the voltage is significantly lower than the normal voltage.
  • the moving body 2 can be moved to a road shoulder that does not interfere with other moving bodies.
  • An abnormality sensor for detecting an abnormality in the system or wiring system of the main power supply 11 is provided without the state sensor 19, and based on the detection result of the abnormality sensor and the detection result of the sensor 30 of each sensor 30, The control unit 14 may make the first judgment.
  • FIG. 9 is a block diagram showing the states of the selector unit 16 when the control unit 15 according to Modification 2 makes the first judgment and the second judgment.
  • FIG. 9 shows a case where at least one element group 20 included in the main power supply 11 has an abnormality and the auxiliary power supply 12 also has an abnormality.
  • the control unit 15 makes a first judgment based on the detection result of the sensor 30 that detects, for example, the second element group 22 in which an abnormality has occurred, and the abnormality sensor 17 detects the abnormality of the secondary power supply 12. A second judgment is then made.
  • the control unit 15 determines the normal element group 20 based on the detection result of each sensor 30, and selects one element group 20 (the first element group 21 in this modification) for backup. Decide to use it as a power source.
  • the control unit 15 closes only the switch unit 161 of the first element group 21 that has been determined to be used as a backup power supply, and electrically connects the first element group 21 to the auxiliary equipment system 4 .
  • power is supplied from the first element group 21 to the drive system 3 via the auxiliary system 4 and the DC/DC converter 13 . Therefore, the motor 6 of the drive system 3 can be driven auxiliary although the voltage is significantly lower than the normal voltage.
  • the moving body 2 can be moved to a road shoulder that does not interfere with other moving bodies.
  • auxiliary machine system 4 and the drive system 3 can be referred to as a case where an abnormality occurs in the main power supply to at least one of the In any of the above-described embodiment, modified example 1 and modified example 2, power is supplied from the backup power supply to the system in which an abnormality has occurred, out of the drive system 3 and the auxiliary equipment system 4. It will be fine if you don't set it. As a result, it is possible to reduce the weight and space of the entire system.
  • one element group 20 among the plurality of element groups 20 is selectively used as a backup power source, but at least one of the plurality of element groups 20 is used as a backup power supply in advance. may be determined as a power supply for
  • the element group 20 as a backup power supply is electrically connected to the drive system 3 via the auxiliary system 4 and the DC/DC converter 13, but the element as a backup power supply
  • the group may be electrically connected only to the accessory system 4 . Even in this case, it is possible to cope with at least the abnormality of the sub power supply 12 .
  • the backup power supply when the backup power supply supplies power to the drive system 3 for a predetermined period of time, power is also supplied from the auxiliary power supply 12 to the drive system 3 via the auxiliary system 4 as an example. .
  • the backup power supply may supply power to the drive system 3 for a predetermined period of time.
  • the electric storage element 10 in which only one electrode assembly 700 is accommodated in the container 100 is illustrated, but a plurality of electrode assemblies may be accommodated in the container.
  • the positive electrode tab portion 721 and the negative electrode tab portion 722 are reversed (upside down) when viewed in the X-axis direction between one end surface and the other end surface of the main body portion 710 of the electrode body 700 .
  • the case is exemplified, it does not have to be reversed.
  • only at least one positive electrode tab portion 721 may be provided on one end surface of the electrode body, and only at least one negative electrode tab portion 722 may be provided on the other end surface. That is, the storage element may have only one set of positive and negative electrode terminals.
  • the wound electrode body 700 is exemplified.
  • the shape of the electrode body is not limited to the wound type, and may be a stack type in which flat plates are stacked, or a shape in which the electrode plates and/or separators are folded in a bellows shape (a separator is folded in a bellows shape to form a rectangular electrode plate). may be sandwiched between them, or a configuration in which the electrode plate and the separator are stacked and then folded in a bellows shape, etc.).
  • the stacking direction of the electrode bodies may be the Y-axis direction (first direction).
  • the first concave portion 101 is arranged at the same position in the first side surface portion 110 and the second side surface portion 120, but the first side surface portion 110 and the second side surface portion 120 each , the first recess 101 may be arranged at different positions. Also, the first concave portion 101 may be formed only in one of the first side portion 110 and the second side portion 120 .
  • the present invention can be applied to power supply systems equipped with power storage elements such as lithium ion secondary batteries.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
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  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
PCT/JP2022/044841 2021-12-15 2022-12-06 電源システム及び電源システムの制御方法 Ceased WO2023112766A1 (ja)

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CN202280091521.5A CN118695966A (zh) 2021-12-15 2022-12-06 电源系统以及电源系统的控制方法
US18/719,072 US20250091479A1 (en) 2021-12-15 2022-12-06 Power supply system and method for controlling power supply system
DE112022006013.1T DE112022006013T5 (de) 2021-12-15 2022-12-06 Leistungsversorgungssystem und Verfahren zur Steuerung eines Leistungsversorgungssystems
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JP2013168253A (ja) * 2012-02-14 2013-08-29 Hitachi Maxell Ltd 巻回型電池
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JPH06255402A (ja) * 1993-03-05 1994-09-13 Hino Motors Ltd 内燃機関の制動および補助動力装置
JP2013168253A (ja) * 2012-02-14 2013-08-29 Hitachi Maxell Ltd 巻回型電池
JP2018148733A (ja) * 2017-03-08 2018-09-20 株式会社オートネットワーク技術研究所 車載用電源部の制御装置及び車載用電源装置
WO2020044938A1 (ja) * 2018-08-29 2020-03-05 カルソニックカンセイ株式会社 電源システム
JP2020124060A (ja) * 2019-01-31 2020-08-13 トヨタ自動車株式会社 車両用電源回路

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US20250091479A1 (en) 2025-03-20

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